Wind tunnel aeroelastic studies on the behaviour of two parallel cables

The behaviour of two parallel transmission line cables under high winds is examined through aeroelastic wind tunnel testing of cable models. Cables with different characteristics and spacing between them are simulated and tested at transverse wind incidence. The results obtained demonstrate good agreement between measured values and theoretical prediction. Correlation coefficients of the drag forces of the two cables were obtained. They vary little with wind velocity and are bigger for the smallest separation between cables. The coherence between the forces was also found to be smaller for the larger separations between cables and decreases with velocity.